Carbon holder



Aug. 11, 1936. EVANS 2,050,297

CARBON HOLDER Filed July 28, 1952 INVENTOR. 11 1 EVAN 1?. EVANS,

BY M 044/3444, $624M ATTORNEYS.

Patented Aug. 11, 1936 UNITED STATES PATENT "OFFICE Application July 28,1932, Serial No. 625,328

11 Claims.

This invention relates toimprovements in manifolding devices such as manifolding books and in respect to its more specific features, it relates to a manifolding book embodying an improved one or more carbon or transfer sheets in position for interleavement with. record sheets of the book and being simple in structure, effective in operation and economical in manufacturing costs.

A further object is to provide for books of the class mentioned an improved clamping device for the transfer sheets designed to maintain the latter in smooth, operative position, to provide for quick and easy insertion or removal of the transfer sheets, and to provide a protective structure for the transfer'sheets and record sheets and parts of the manifolding book disposed inwardly from the clamping device. r

Other objects will be in part obvious and in part, be pointed out hereinafter.

For a further understanding of the invention,- reference may be had to the accompanying drawing, in which Fig. 1 is a perspective view of a manifolding book embodying the invention,

Fig. 2 is a detailed view of the carbon sheet holding device, i

Fig. 3 is a cross section of the carbon sheet holder with the carbonsheet in position ready for use, and. I

Fig. 4 is a sectional .view similar to Fig. 3 but showing the clamping bar in open position.

In the accompanying drawing a cover I includes a lower cover member 2 and an upper cover member 3, and a hinge or connecting por tion 4.. Mounted on'the member 3 near the hinge 40 is a pair of spring pressed clamping jaws. The

latter may be composed of upper and lower jaws 5 and 6 hinged together at I. The lower jaw B is'attached to the member}! with suitable fasteners. Pressure is exerted on the jaw 5 by means 45 of a spring so that its edge 8 normally presses against the corresponding edge of the jaw'6. It

is preferable that the edges 8 be of saw tooth construction. A portion of the jaw 5 is turned up to form the handle 9 which may be used in opening the jaws.

'A pad Ill of any desired construction may. then "be inserted between the jaws. Upon releasing the pressure on the member 9 the pad is firmly gripped between the jaws 5 and 6 and it will lie firmly 55 and flatly against the member 3. Because of the saw tooth construction of the edges 8, the pad cannot be'displaced or removed from the cover without opening the clamping jaws.

While the construction disclosed in the above description and in the accompanying drawing is 5 a preferred type of book, it is to be understood that the present invention may be used in conjunction with any type of manifolding book.

Affixed to the side of the member 3 is a carbon holder. This is more specifically shown in Fig. 2. 10 The carbon holder may be composed of two metal plates I l and i 2. Suitable fasteners extend through i the plates II and I2 into the cover member 3 thereby securing the carbon holder to the book.

The members II and I2 have upwardly turned edges forming the flanges l3 and I4 and the latter are spaced apart to form a narrow groove IS. The flanged portions are preferably composed of a resilient material. Each flange may include two or more plies formed by bending the material backwardly upon itself to form the upper edges l6 and I! as shown in Fig. 3. This structure serves to increase the strength of the flanges without materially detracting from their yielding and resilient properties, while at the same time smooth, rounded edges are presented functioning to avoid tearing or otherwise damaging the paper. It is preferred that the height of the outer flange l3 be equal to or greater than the thickness of the pad to be used in association therewith. It is likewise preferred that the height of the inner flange ll be about one-half that of the pad.

Pivoted at l8 between the ends of the flanges l3 and I4 is the clamping bar IS. The latter is preferably slightly longer thanthe flange mem-. bers and when in horizontal position extends through the groove 15. It likewise is made of a resilient material and may be a two-ply construction formed by bending the member upon itself. The plies may be spaced slightly apart, thereby making each side'independently resilient as is shown at Isa in Fig. 4. In thisconstruction, when the bar I9 is forced in place between the flanges l3 and I4, there is a compression of the members !9a with the corresponding tendency to hold the bar in place between the flange members. The clamping bar l9 may taper at its free end and terminate, in a 'small knob-like handle 20. However, any type of handle may be employed.

A U shaped member 2| is preferably fitted over flange M at the end where bar I9 is pivoted. This is formed by folding a strip of metal upon itself so that one end engages one side of flange l4 and the other end engages the other side. It

is preferred that the member 2| be about equal in height to the top edge of the clamping bar It. The pivot 18 extends through the flange ii, the

clamping bar is, the member 2| and the flange II. The member 2| in this manner serves to give a firmer support to the arm l9 than would be oiferedby the comparatively low flange M.

It is desirable that the clamping bar be held firmly and free from movement when it is in operating position, i. e. lying in a horizontal position in the groove [5 between the flanges l3 and I4. To accomplish this, a circular indent 22 may be stamped into the arm l9. To cooperate with this, a circular impress may be stamped into flange l3. This causes a circular protrusion 23 on the inner face of the flange which will engage the indent 22. To insure engagement of these elements the top of the inner flange M at the point opposite protrusion 23 may be inclined towards the flange I3 thereby pressing bar ll against flange I 3. At various points 'along the bar l9, detents or similar protrusions 24 may be formed to aid in holding the bar against accidental movement when in operating position.

In the preferred embodiment, the arm IQ is formed with a scallop like indentation at 25 by tapering the arm sharply from the pivoted portion to 25 and tapering it gradually from 26 to 25. In other words the edge of the clamping bar is cut away at an abrupt inclination to the bar edge to form the side of the indentation toward the pivotal mounting, while the cut at the other side of the indentation remote from the pivotal mounting is inclined gradually or less abruptly than the other side thereof.

It will be seen now that a manifolding pad of any desired type may be inserted between the clamping jaws. The clamping bar I! is then raised to vertical position and a sheet of transfer material is placed face downwardly so that its one. edge rests on the top iii of the flange l3.

The bar is is then lowered to horizontal position. The scalloped indentation 25 in arm I! prevents wrinkling or puckering of the carbon paper, while the arm is being lowered. When the arm I9 is in horizontal position, the indent 22 cooperates with circular protrusion 23 and the carbon paper is locked firmly in position. As shown in Figure 3, the carbon paper may extend between the side of flange l3 and the side of bar l8, under bar I9, between the side of flange l4 and bar I9, over the top edge "of flange l4, and extends thence across the lower cover member. Due to the resilient nature of the flanges and bar, the carbon paper is held firmly in position, but'is in no way torn or injured. The carbon sheet may then be placed between the leaves of the pad as desired and the book is ready for use. Of course, it is to be understood that more than one carbon paper may be employed in this manner depending upon the number of copies desired. As above pointed out, the indentation 25 is formed in the lower strip-engaging edge of the toward closed or clamping position, the gradually inclin'ed forward edge of the indentation will first contact with the near or adjacent edge of the carbon sheet. Due to the formation of the indentation as described. the bar will have swung well along toward its closed position before the carbon sheet is initially 5 contacted by the gradually inclined edge of the indentation. Because of this relation of the parts, the angle between the sheet-engaging bar edge and the edges of the clamping flanges will be very small, and therefore the tendency of the closing bar to crumple or to force the sheet outwardly away from the pivot will be practically nil.

Therefore, by virtue of this indentation the clamping bar is moved into sheet-clamping position without any appreciable tendency to force 15 the sheet outwardly along the flange away from the pivot point, damage to the sheet being thus avoided and correct positioning thereof assured when it is secured in operative position.

It will be observed that the edge I! of the flange 0 I! only extends to about the middle of the pad II. The carbon paper, therefore, only has to be long enough to reach from this point to the far side of the top or the bottom of the p d. Furthermore the lower inner flange l4 pr vides-for 25 more freedom of manipulation in interleaving the carbon sheet in position between the record leaves, whether the record book is of full thickness or whether it has been depleted by partial usage of the leaves. Also it will be observed that the outer flange l3, being relatively wide and substantially equal in width to the thickness of a complete record book, and positioned at the edge of the cover member 3 along the edge of the book and outside of the carbon sheet, provides a 35 shield and protection for the inwardly disposed parts in addition to its sheet-clamping function.

It is apparent that the carbon sheet may be removed, reversed or replaced at will. If one portion should become unduly worn because of con centration of use, the sheet may be reversed thereby bringing a fresh portion into the area of concentrated use.

Themanifolding book may be of the type that has original and duplicate leaves alternated throughout the book. of course, it is to be understood that the book may have an original and as many copy leaves as desired. The carbon sheet is inserted between the original and duplicate leaves. If there is more than one copy leaf, the number of carbon sheets will accordingly have to be increased and will be inserted between the original and the first copy leaf and between each adjacent pair of the other copy leaves. It will be seen when the operator writes upon the original that an accurate copy will be made upon the duplicate. When the entry upon a given leaf is complete, it is removed from the pad. As the pad is used and the leaves are removed, it will become thinner. It is for this purpose that the 60 inner flange member ll preferablyextends in height only to the center of the book. The carbon sheet will then have to extend only from this point to the top or the bottom at most. In this manner any overhanging of the carbon paper on 5 the far side of the pad is avoided.

Thus, by the above described construction are accomplished, among others, the objects hereinbefore referred to.

As many changes could be made in the above 7 construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying draw- 75 Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A clamping device including two perpen dicular flanges formed of resilient material, said flanges being spaced laterally with respect to one anothena common base to which both of said flanges are secured, and a pivoted clamping bar positioned between said flanges, said clamping bar having two independently resilient sides.

2. A clamping device for sheet material including, two parallel flanges formed of resilient material, said flanges being spaced laterally with respect to one another, a common base to which both of said-flanges are secured, and a clamping bar having two independently resilient sides and a supporting pivot mounting it for engagement between said flanges, the lower face of said clamping bar being indented near said supporting pivot.

3. A clamping device for sheet material includ ing two parallel flanges formed of resilient material, said flanges being spaced laterally with respect to one another, a common base to which both of said flanges are secured, a clamping bar having two independently resilient sides and a supporting pivot mounting it for engagement between said flanges, the lower face of said clamping bar being indented near said supporting pivot and means associated with said clamping bar and flanges to releasably lock the free end of the clamping bar between said flanges.

4. A clamping device for clamping sheet material, including, in combination, two parallel flanges formed of resilient material and attached in laterally spaced position relatively to each other, a clamping bar having a material engaging edge, and a pivotal support mounting said bar for movements away from said flanges and into position therebetween so as to clamp the sheet material between the sides of the bar and flanges, and said pivoted clamping bar having an indentation in its said edge near said pivotal support, said indentation opening through theedge of the clamping bar whereby the bar within said indentation engages the sheet material when the bar moves on its pivot into closed position so as to avoid abnormal puckering or displacement of the sheet material during initial pivotal closing movement of the clamping bar.

5. A clamping device for clamping sheet material, including, in combination, two parallel flanges formed of resilient material andattached in laterally spaced position relatively to each other, a clamping bar having a material engaging edge, and a pivotal support mounting said bar for movements away from said flanges and into position therebetween so as to clamp the sheetmaterial between the sides of the bar and flanges, said pivoted clamping bar having an indentation in its said edge near said pivotal support, said indentation opening through the edge of the clamping bar whereby the bar within the indenta tion engages the sheet material when the bar moves on its pivot into closed position so as to avoid abnormal displacement of the sheet material during initial pivotal ,closing mo'vement of the clamping banthe edge of one of said flanges in alignment with the strip engaging part of said indentation of the clamping bar being straight. a

6. In a clamping device for clamping sheet material in combination, two parallel flanges formed of resilient material and attached in laterally spaced position relatively to each other, a support on one edge oi. which said flanges are mounted in upstanding position, a clamping bar, a pivotal support mounting said bar for movements away from said flanges and into position therebetween so as to clamp the sheet material between the sides of the bar and flanges, the inner of said flanges with reference to said support, having its.

upper edge terminating below the upper edge of the outer flange so as to provide for free positioning of the clamped sheet member inwardly of the clamping device.

7. In a clamping device for clamping sheet material, in combination, two parallel flanges formed of resilient material and attached in lat erally spaced position relatively to each other, a support on one edge of which said flanges are mounted in upstanding position, a clamping bar, a pivotal support mounting said bar for move- 'ments away from said flanges and into position therebetween so as to clamp the sheet material between the sides of the bar and flanges, the inner of said flanges with reference to said support, having its upper edge terminating below the upper edge of the outer flange so as to provide for free positioning .of the clamped sheet member inwardly of the clamping device and said pivoted clamping bar having an indentation in its lower edge near said pivotal support and adjacent to the flange edge, so as to avoid puekering of the sheet material during initial closing movements of the clamping bar.

8. In a clamping device for clamping sheet material, in combination, two parallel flanges formed of resilient material and attached in laterally spaced position relatively to each other, a support on one edge of which said flanges are mounted in upstanding position, a clamping bar, a pivotal support mounting said bar for movements away from said flanges and into position therebetween so as to clamp the sheet material between the sides of the bar and flanges, the

inner of said flanges with reference to said support, having its upper edge terminating below the upper edge of the outer flange so as to provide for free positioning of the clamped sheet member inwardly of the clamping device, and the outer flange being wider than the inner flange and extending along one edge of the support and upwardly beyond the clamped sheet edge, and other inwardly disposed parts so as to provide a protection therefor and for the edge of the support.

9. A carbon sheet holding device including two parallel flanges of resilient material, said flanges being spaced laterally with respect to one another, a common base to which both of said flanges are secured, a clamping bar having two independently resilient sides pivoted adjacent one end for movement between said flanges, said clamping bar being formed with a cut-away portion adjacent to its pivot point for avoiding wrin kling or other damage to a transfer sheet when inserted into said holding device, and means for releasably locking the free end of said clamping bar between said flanges.

10. A clamping device for clamping sheet material, including, in combination, two parallel flanges formed b1 resilient material and attached tation in its said edge near said pivotal support, said indentation opening through the edge 0! the clamping bar whereby the bar within said indentaticn engages the sheet material when the bar moves on its pivot into closed position so as to avoid abnormal puckering or displacement oi the sheet material during initial pivotal closing movement of the clamping bar, said indentation at its end portion toward the pivotal support inclining abruptly to the bar edge, and inclining less abruptly at its strip engaging end portion disposed away from the pivotal support.

11. A clamping device for clamping sheet mate- 'rial, including, in combination, two parallel flanges iormed of resilient material and attached in laterally spaced position relatively to each .other, a clamping bar having a material engaging edge, and a pivotal support mounting said bar for movements away from said flanges and into position therebetween so as to clamp the sheet material between the sides of the bar and flanges, said pivoted clamping bar having an indentation in its siid edge near said pivotal support, said indentation opening through the edge 01! the clamping bar whereby the bar within the indentation engages the sheet material when the bar moves on its pivot into closed position so as to avoid ab- EVAN R. EVANS. 

